Filter cartridge top



FIG. 1 is a front and top perspective view of a filter cartridge top on a filter cartridge showing our new design; and,

FIG. 2 is a top view thereof.

The broken line showing of environmental structure in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a filter cartridge top, as shown and described. 